Joe DiMaggio's love letter to Marilyn Monroe sells for $78,000

Marilyn Monroe's passionate love letters didn't just mean a lot to her. They're also worth tens of thousands of dollars apiece to the unnamed buyers who scooped them up at auction this weekend.

One letter from her soon-to-be ex-husband Joe DiMaggio, the Yankee great, sold for more than $78,000, Julien's Auctions announced.

"Dear Baby -- Don't know what you're [sic] thoughts are about me, but I can tell you I love you seriously, way deep in my heart, irregardless of anything," he wrote, shortly after he learned they'd be divorcing when she announced it publicly.

After splitting from DiMaggio, she married playwright Arthur Miller, and a letter she wrote to him fetched nearly $44,000.